Ja n 19 99 TUM-HEP-336 / 98 IFT-14 / 98 hep-ph / 9901278 QCD corrections to FCNC decays mediated by Z-penguins and W-boxes

QCD corrections are evaluated to FCNC processes like B → Xsνν̄, K → πνν̄, B → ll or KL → μμ, i.e. to processes mediated by effective operators containing neutrino currents or axial leptonic currents. Such operators originate from W -box and Z-penguin diagrams in the Standard Model. QCD corrections to them are given by two-loop diagrams. We confirm results… CONTINUE READING